Vintage Cameo Brooch Mourning Pendant Black Resin Steampunk Victorian

Vintage Cameo brooch pendant in what we believe is black resin, likely made in the 70s. Black resin/composite cameo with faceted edges and gold tone metal setting. Back features a loop for wear as a pendant and a pin. Measures appx 1.5in diameter. No manufacturer's stamp. Preowned/vintage with signs of use & wear: chips/scratches to resin (zoom all photos); some discoloration to gold tone metal setting.